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Recommended separation distances between portable and mobile RF
communications equipment and the AC-81MD/82MD
The AC-81MD/82MD is intended for use in an electromagnetic environment in which radiated
RF disturbances are controlled. The customer or the user of the AC-81MD/82MD can help
prevent electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communications equipment (transmitters) and the AC-81MD/82MD as
recommended below, according to the maximum output power of the communications
equipment.
Rated maximum
output power of
transmitter
150 kHz to
W
80 MHz
d = 1.2 √P
0.01
0.1
1
10
100
For transmitters rated a maximum output power not listed above, the recommended separation
distance d in meters (m) can be estimated using the equation applicable to the frequency of the
transmitter, where P is the maximum output power rating of the transmitter in watts (W)
according to the transmitter manufacturer.
NOTE 1: At 80 MHz and 800 MHz, the separation distance for the higher frequency range
applies.
NOTE 2: These guidelines may not apply in all situations. Electromagnetic propagation is
affected by absorption and reflection from structures, objects and people.
Separation distance according to frequency of transmitter
IEC 60601-1-2 : 2007
80 MHz to
800 MHz
d = 1.2 √P
0.12
0.12
0.38
0.38
1.2
1.2
3.8
3.8
12
12
m
IEC 60601-1-2 : 2014
800 MHz to
150 kHz to
2.5 GHz
80 MHz
d = 2.3 √P
d = 1.2 √P
0.23
0.12
0.73
0.38
2.3
1.2
7.3
3.8
23
12
80 MHz to
2.7 GHz
d = 2.0 √P
0.20
0.63
2.0
6.3
20
11
GB
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